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Information × Registration Number 0222U005451, 0118U003915 , R & D reports Title Development of theory for the design of thin-walled high-strength nanocomposite elements of launch vehicles popup.stage_title Head Avramov Kostiantyn V., Доктор технічних наук Registration Date 30-12-2022 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2  A study of the dynamic properties of thin-walled rocket elements from nanocomposite materials and honeycomb core which is manufactured by FDM additive technology was conducted. A mathematical model of the vibrations of a multi-layer shell, which has outer layers and a central layer of nanocomposite materials alternating with layers of honeycomb core, has been developed. It was established that changing the direction of the reinforcement of the outer layers with carbon nanotubes allows you to significantly influence on the natural frequencies of oscillations. A calculating method of the dynamics of composite rocket structures has been developed, taking into account the influence of the local loss of stability of near-surface layers. A model, method and algorithms of the dynamics of a rod composite structural element with near-surface delamination, which can lose stability upon reaching a critical compression deformation, have been developed. The nonlinear dynamics of rod elements with a single crack and a system of collinear cracks were studied. Product Description popup.authors popup.nrat_date 2022-12-30 Close